%0 Journal Article
%A Tokar, Mikhail
%A Koltunov, Mikhail
%T 'Shell' approach to modeling of impurity spreading from localized sources in plasma
%J International journal of modeling, simulation, and scientific computing
%V 05
%N supp01
%@ 1793-9623
%C Singapore {[u.a.]
%I World Scientific
%M FZJ-2014-06628
%P 1441005
%D 2014
%X In fusion devices, strongly localized intensive sources of impurities may arise unexpectedly or can be created deliberately through impurity injection. The spreading of impurities from such sources is essentially three-dimensional and nonstationary phenomenon involving physical processes of extremely different time scales. Numerical modeling of such events is still a very challenging task even by using most modern computers. To diminish the calculation time drastically a "shell" model has been elaborated that allows to reduce equations for particle, parallel momentum and energy balances of various ion species to one-dimensional equations describing the time evolution of radial profiles for several most characteristic parameters. The assumptions of the "shell" approach are verified by comparing its predictions with a numerical solution of one-dimensional time-dependent transport equations.
%F PUB:(DE-HGF)16
%9 Journal Article
%R 10.1142/S1793962314410050
%U https://juser.fz-juelich.de/record/173217